Speaker
Prof.
Houlei Chen
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
Description
Hybrid J-T cooler has been the most commonly used 4K cryocooler in space detectors. Although resistance of the J-T valve deeply affects the performance of the J-T cooler, few researches have been down especially on the J-T orifice. Because the J-T process is quite complicate, the dimensionless resistance coefficient is defined and deduced using dimensional analysis method to evaluate the pressure drop of the J-T orifice. Then, experimental research is carried out and a series of J-T orifices are experimentally tested. Then, the experimental correlation equations of the resistance coefficient at 4.2K are achieved based on the results of dimensional analysis and experiments.
Primary author
Dr
Yuexue Ma
(Technical Institute of Physics and Chemistry CAS)
Co-authors
Dr
Jia Quan
(Technical Institute of Physics and Chemistry CAS)
Dr
Juan Wang
(Technical Institute of Physics and Chemistry CAS)
Dr
Yanjie Liu
(Technical Institute of Physics and Chemistry CAS)
Prof.
Houlei Chen
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
Dr
Jianguo Li
(Technical Institute of Physics and Chemistry CAS)
Prof.
Jingtao Liang
(Technical Institute of Physics and Chemistry CAS)
